Pump and distributor mechanism



. W 1, 1947- A. A. KUCHER 2,418,412

FUN]? AND DISTRIBUTOR IEdHANISM Filed Bay 28, 1943 H TTOBNE Y Patented Apr. 1, 1947 7' PUMP AND DISTRIBUTOR MECHANISM I] 7 Andrew A. Kucher, Grosse Pointe Farms, Mich.,

assignor to Bendix Aviation Corporation, Detroit, Mich., a corporation of Delaware Application May 28, 1943, Serial No. 488,865

'1 Claims. (Cl. 103-131) This invention relates to pump and distributor mechanisms, and, while useful for various purposes, it is herein described as' embodied in a mechanism for feeding fuel to a multi-cylinder internal combustion engine.

An object of the invention is to provide a compact and light-weight mechanism of th s character, capable of being readily maunfactured with high precision.

Another object is to provide a pump, having multiple outlets, with a simple adjustment for quickly and accurately varying the delivery thereof and operative to adjust the delivery of all its outlets in exactly the same amount.

' A further object is to provide such an adjustment having means by which it can be actuated while the pump is running.

These and other objects of the invention, and various novel constructions and. arrangements embodied in' the mechanism, will be apparent from the following description of the illustrative mechanism shown in the accompanying drawing, in which:

Figure 1 is an elevation of a pump and dis tributor embodying my invention, partly broken away in central section;

Figure 2 is a section on line 2-2 of Figure 1; Figure 3 is a partial elevation of one of the valve assemblies;

Figure 4 is a partial section on the line 4-4 of Figure 3;

Figure 5 is an exploded perspective of the end of thedriving shaft. and an adjustment member assoc ated therewith;

Figure 6 is a section of an adjustable eccentric carried by the driving shaft, and of a sleeve which is actuatedby the parts shown in Figure 5 to adjust the effective throw of the eccentric.

The particular embodiment of the invention illustrated'is intended for feeding fuel to an internal combustion engine or a Diesel cycle injection engine. It comprises a case, shown made in sections including a cylinder Ill and two plates l2 and I4 having respectively series of inlet open-- ings I6 and outlet open ngs 18. The plates constitute the side walls of the pumping chambers described below.

A plate 20, has openings 22 leading into inlet valve recesses 24 (in the sid plate I2), is associated with the side plate l2 Similar recesses '26 for the' outlet valves are in an end plate 28,

and each of these outlet valve recesses communicates with an outlet opening [8 and with one of a plurality of conduit connections 30 lead: ing to one of the engine cylinders. The end plate 28 has lugs 32 having openings for bolts or the like for mounting the whole assembled unit;

At the inlet side there is arranged an end plate 34 formed with an annular space or manifold ,36 which receives fuel from anintake connection 36, and leads it to all of the inlet openings The above-described parts are secured t0-' gether in on compact unit by means such as ried by the plate 20 or M. The carrier plate 42 is formed with recesses receiving the enlarged inner ends of valve fiappers 46 and corresponding valve springs 48. It will be noted that raised valve seats are formed around the openings 22 and I8, for engagement by the corresponding valv fiappers 46.

The end plate 28 is provided at its center with a bearing 50 for a driving shaft 52, and with an oiler 54 and a seal 56. On the end of the shaft 52 is formed an eccentric 58, and projecting axially from the end of theshaft is a square key receivedin a corresponding opening in an adjustment-operating member 62. Member 62 has a lug 64 received in a cam slot 66 formed in a rotatable sleeve 68 journaled in the end plate 34 and provided with a stuffing box 10.

The sleeve 68 carries a pin 12 seating in a recess in an eccentric 14 mounted on the eccentric 58, Eccentrics 58 and 14 are of the same width as cylinder l0, and turn in the plane of the cylinder. Member 62 is actuated, against the resistance of a spring 16, by pushing on a thrust part 18 backed up by a thrust bearing 86. Pushing on the thrust part 18 actuates the lug 64 in the cam slot 66 to turn the eccentric 14 upon the eccentric 58. In one extreme position the one eccentric offsets the other, and the outer surface of eccentric I4 is coaxial with respect to By shifting the member 62 from this possible. The cylindrical member .84 is formed with radial slots slidably receiving vanes 86, the outer ends of which are formed for line contact with the inner face of the cylinder Ill.

The inner ends oi'- the vanes 86 seat against a ring 88 arranged in an annular recess in the side of the cylindrical member 84, just outside the flange 82. The ring 88, the cylinder l0, and the shaft 52 are all coaxial. The cylindrical member 84 is held from turning by means such as a pin 90, which it carries, and which projects into a radial slot 92 in the plate M.

In operation, as the shaft 5.2 is aten, it in turn operates the eccentric I2 to move the cylindrical member 84 with an oscillatory motion, something like a swash plate except that the motion is in its own plane. Thismembenwith the cylinder l and the vanes 86, forms a series of expansible and contractible pump chambers corresponding respectively with the inlet and outlet openings. This forces the fuel from the intake 38 successively through the several connections 30 leading to the difierent cylinders of the engine. The quantity ofiuel delivered at eachrevolution can be varied by manipulating the adjustment 18-62 to vary the throw of the eccentric 14. While one illustrative embodiment has been described in detail, it is not my intention to limit the scope of the invention to that particular embodiment. or otherwise than by the terms of the appended claims.

I- claim:

1. A pump and distributor comprising a cylinder. a member mounted therein having slight ososcillatory and radial reciprocative movements, a plurality of non-rotating vanes radially mounted thereon. non-yielding means for retaining the vanes against the wall of said cylinder, an eccentric for driving said member, means for driving the eccentric. means for adjusting the eccentric and rendering it ineffective for driving the member operative while the pump is in o eration. side walls for the cylinder having the member and the vanes between them, said walls having ,respectively inlet and outlet openings arranged opposite ea h other between the vanes, valves contro ling said openings. means for delivering fluid to all of said inlet openings. and a separate fluid connection leading from each of the outlet openings.

2. A pump and distributor comprising a cylinder. a member mounted therein having slight oscillatory and radial reciprocative movement, a plurality of non-rotating vanes radially slidable therein, non-yielding means engaging the inner.

ends of said vanes and holding them against the wall of said cylinder, an eccentric for driving said member, means adjusting the eccentric, while the pump is in operation, side walls for the cylinder having the member and the vanes between them, said walls having respectively inlet and outlet openings arranged opposite each other between the vanes, valves controlling said openings, means for delivering fluid to all of said inlet openings, and a separate fluid connection leading from each of the outlet openings.

3. A pump and distributor comprising a driving shaft having a pair of eccentrics mounted. thereon one being shiftable on the other to provide a variable throw while the pump is operating, a cylindrlcal memberdriven with oscillatory and radial reciprocative motions in its own plane by the ecpmtes l2 and u, with as little side clearance as cylinder encircling and engaged by the outer ends of said vanes, non-yielding means for holding walls having a valved inlet opening for each of s'aidpuniping chambers and'one of said side walls having a valved outlet for each of 'said pumping chambers, means to supply fluid to all of the inlet openings, and a separate fluid connection lead- .ing from each of the outlet openings.

4. A- pump and distributor comprising a driving eccentric, a cylindrical member driven with oscillatory and radial reciprocative motions in its 'own plane by the eccentric, a series of nonrotating radial vanes carried by the cylindrical member and slidable relative thereto as it is driven by the eccentric, a cylinder encircling ,and

engaged by the outer ends of said vanes, nowyielding means for holding the vanes radially outward against said. cylinder, side walls embracing the cylinder between them and forming therewith and with said vanes and said cylindrical member a series of expansible and contractible pumping chambers, one of said side walls having a valved inlet opening for each of said pumping chambers and one of said side walls having a valved outlet for each of said pumping chambers,

means to supply fluid to all of the inlet openings, a separate fluid connection leading from each of the outlet openings and means for varying the throw of the. eccentric while the pump is operating.

5. A pump and distributor comprising a driving shaft having a pair of eccentrics mounted thereon one being shiftable on the other top'rovide a variable throw while the pump is operating, a cylindrical member driven with oscillatory and radial reciprocative motions in its own plane by the eccentrics, a series of non-rotating radial vanes on which the member slides as it is driven by the eccentrics,-a cylinder encircling and en gaged by the outer ends of said vanes, non-yielding means for holding the vanes radially outward against said cylinder, side walls embracing the cylinder between them and forming there- 'with and with said vanes and said cylindrical g the outlet openings.

centrics, a series of non-rotating radial vanes car- 6. A pump anddistributor' comprising a driving eccentric, a cylindrical member driven with oscillatory and radially reciprocative movements in its own plane by the eccentric, a series of non-rotating radial vanes carried'by the member on which the member slides as it is driven by the eccentric, a cylinder encircling and engaged by the outer ends 01' said vanes, non- .yielding means for holding the vanes radially outward against said cylinder, side walls em bracing the cylinder between them and forming therewith and with said vanes and said cylindrical member a series of expansible and contractible pumping chambers, said pump and distributor having a valved inlet opening for each a separate fluid connection leading from each of the outlet openings, and means for varying the throw of the eccentric while the pump is operating.

7. A pump and distributor comprising a driving eccentric, a cylindrical member driven with oscillatory and radially reciprocative movements in its own plane by the eccentric, a series of nonrotating radial vanes carried by the cylindrical member and on which the cylindrical member slides as it is driven by the eccentric, a cylinder encircling and engaged by the outer ends of said vanes, non-yielding means for holding the vanes radially outward against said cylinder, side walls embracing the cylinder between them and forming therewith and with said vanes and said cylindrical membera series of expansible and contractible pumping chambers, said pump and distributor having a'valved inlet opening for each of said pumping chambers and also having a valved outlet for each of said pumping chambers, means to supply fluid to all of the inlet openings, and a separate fluid connection leading from each of the outlet openings, the valves for said openings comprising a pair of plates carrying flappers seating over said openings and moved away irom the openings by fluid pressure acting through the openings, and means for varying the throw of the eccentric while the pump is operating.

ANDREW A. KUCHER.

REFERENCES CITED The following references are of record in'the file of this patent:

UNITED STATES PATENTS French Oct. 29, 1928 

